安装时gem版本出错
[英]Error on gem version when installing
问题描述
I am trying to install the github-pages gem on Ubuntu 14.04. 
我正在尝试在Ubuntu 14.04上安装github-pages gem 。
I get this error about the version of a dependency (with or without sudo doesn't change the outcome): 我收到有关依赖项版本的错误（带或不带sudo都不会改变结果）：
$ sudo gem2.0 install github-pages
ERROR: While executing gem ... (Gem::DependencyError)
Unable to resolve dependencies: github-pages-health-check requires public_suffix (~> 1.4)
However, doing gem2.0 list --local shows me: 但是，通过gem2.0 list --local ：
public_suffix (2.0.4)
What's the problem here? 这是什么问题 I have 2 coexisting versions of ruby (ruby1.9.3 and ruby2.0), but I have made /usr/bin/ruby link to ruby2.0. 我有2个共存的ruby版本（ruby1.9.3和ruby2.0），但是我已经将/usr/bin/ruby链接到ruby2.0。
1 个解决方案
解决方案1
0 已采纳 2016-11-12 17:31:29
~> is a pessimistic version constraint. ~>是悲观的版本约束。 ~> 1.4 means >= 1.4 and < 2.0 , and your version of public_suffix is not in that range. ~> 1.4表示>= 1.4和< 2.0 ，并且您的public_suffix版本不在该范围内。 Try 尝试
gem install public_suffix -v 1.5.3
which is the newest version that actually satisfies the constraint. 这是实际上满足约束条件的最新版本。
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